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I am using Ubuntu 12.04 amd64 desktop.

It worked fine, but after the last update, the system does not shutdown.

It gets stuck with the last line on the screen being:

unmounted /kernel/debug

I have to use Ctrl+Alt+Del. It restarts the machine. Then at the grub screen, I choose to hard shutdown the machine.

Can anybody help me with this?

Alaa Ali
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noob00
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  • please see is it useful http://askubuntu.com/questions/125844/shutdown-does-not-power-off-computer – Tarun Sep 11 '13 at 07:51
  • Nope. The link didn't help me. I have already tried acpi=force by editing the entry in grub listing at the startup. – noob00 Sep 11 '13 at 08:01
  • Guys, AFAI could understand, the problem is with some process which takes infinite time at the time of shutdown. It somehow is not being preempted by the kernel. – noob00 Sep 11 '13 at 08:03
  • @noob00 I have updated my answer. please check it out. – Raja G Sep 11 '13 at 08:05

3 Answers3

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Well after some searching I came to know that , your problem belongs to Kernel.All you need to is simply update your Kernel, Source .

So you have to update your Kernel to 3.9, and Instructions are

Open your terminal and then paste this command to make sure that your system is up to date.

sudo apt-get update && sudo apt-get dist-upgrade && sudo apt-get autoremove

Then

after doing update , restart your system to apply the changes and then change to tmp directory.

cd /tmp

Then for 32-bit Ubuntu Kernel is 

wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.9-rc8-raring/linux-headers-3.9.0-030900rc8-generic_3.9.0-030900rc8.201304211835_i386.deb http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.9-rc8-raring/linux-headers-3.9.0-030900rc8_3.9.0-030900rc8.201304211835_all.deb http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.9-rc8-raring/linux-image-3.9.0-030900rc8-generic_3.9.0-030900rc8.201304211835_i386.deb

for 64-bit 

wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.9-rc8-raring/linux-headers-3.9.0-030900rc8-generic_3.9.0-030900rc8.201304211835_amd64.deb http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.9-rc8-raring/linux-headers-3.9.0-030900rc8_3.9.0-030900rc8.201304211835_all.deb http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.9-rc8-raring/linux-image-3.9.0-030900rc8-generic_3.9.0-030900rc8.201304211835_amd64.deb

Then install it with

sudo dpkg -i *.deb

Then update your GRUB

sudo update-grub2

Now restart your system to apply the changes.

Source

Hope that helps.

Raja G
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  • I tried that too but no rescue. It stuck at the same point. – noob00 Sep 11 '13 at 07:54
  • @noob00 , try another Kernel then ...as your message states there something you need to with kernel.http://kernel.ubuntu.com/testing/index.html – Raja G Sep 11 '13 at 08:07
  • Thanks for the changes to your answer rajagenupula. Before trying to follow these steps, I had some inputs. I see a number of linux kernel updats listed at the grub menu. Each of the entry is a different kernel (right??) I already tried booting the system using these different kernels. But same problem was happening. Do you think, new kernel installation'd help?? – noob00 Sep 11 '13 at 08:16
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I've found these solutions for solving the problems with "improper shutdown" and "missing battery indicator" as follows:

System: lenovo G400

OS: Ubuntu 12.04 LTS

Solution: booting with the pci=noacpi kernel parameter (https://wiki.ubuntu.com/DebuggingACPI)

To temporarily add `pci=noacpi' parameter to a kernel:

  1. start your system press and hold Shift key
  2. highlight the kernel you want, and press e key
  3. to the line starting with linux add pci=noacpi at the end
  4. press Ctrl+x to boot

To make change permanent:

  1. sudo gedit /etc/default/grub
  2. have this line GRUB_CMDLINE_LINUX_DEFAULT="pci=noacpi"
  3. sudo update-grub then reboot
BuZZ-dEE
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user238172
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0

have you tried shutting down from terminal using the command

sudo shutdown -P now
sosytee
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  • yes I did try sudo shutdown -P now as well as sudo shutdown -h now . It seems the kernel is always in a wait state because as soon as i press ctrl+alt+del it starts showiing other processes shutting down and restart the computer – noob00 Sep 11 '13 at 07:41